Clicking sound from my bike

Liit2104 · L Plate Warrior Joined: 09 Dec 2015 Karma :

Hello everyone,
Recently my bike (Husqvarna te125 4T) started to make this clicking/rattle sound,
you can see at the video that as i rev it up a bit the sound gets faster
but i noticed when im riding at over about 20-30 kmh
the sound is gone.
any ideas?
https://www.youtube.com/watch?v=4TzZoniowyQ

MCN · Super Spammer Joined: 22 Jul 2015 Karma :

Top of my Head:

Automatic Cam chain tensioner not automatically tensioning?

Video Explanation

Manual

Try an oil change and check the oil drained from the sump for jewellery (Expensive Shiny Stuff).

Not sure if it has a paper element filter or screen but that NEEDS to be examined by removing (and cut open if a throw-away style).
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

Check the exhaust pipes to see if it has any rust holes and replace the exhaust header gasket before tearing the engine down. Pin hole leaks in the header, or a failed exhaust gasket, produces a metallic pinging/clicking noise.